Incorporation of core/shell LiYbF₄: Tm³⁺/LiYF₄ nanoparticles into the SnO₂ electron transport layer of perovskite photovoltaics using a thermal-enhanced vacuum-assisted solution processing method. Liew, S.Q., Dutta, A., Zhao, G., Ng, C.Y., Teridi, M.A.M., Vetrone, F., Zhou, H. and Chong, K.K., 2025. Surfaces and Interfaces, p.108268. DOI: https://doi.org/10.1016/j.surfin.2025.108268

Theoretical Modelling of Non-imaging Solar Furnace System Using Ray-Tracing Method. Chong, K.K., Lim, B.H., Kurniawan, T.A. and Lim, C.S., 2025, May. In International Conference on Computational & Experimental Engineering and Sciences (pp. 1146-1151). Cham: Springer Nature Switzerland. DOI: https://doi.org/10.1007/978-3-031-96732-0_85

Theoretical study for different photovoltaic technologies under spectral irradiances in Malaysia. Liew, S.Q., Low, W.H., Kurniawan, T.A. and Chong, K.K., 2025, May. In IOP Conference Series: Earth and Environmental Science (Vol. 1500, No. 1, p. 012006). IOP Publishing. DOI: https://doi.org/10.1088/1755-1315/1500/1/012006

Green hydrogen production technologies. Chong, K.K., Pang, Y.L., Kong, S.G. and Kurniawan, T.A., 2025. In Accelerating the Transition to a Hydrogen Economy (pp. 405-448). Elsevier. DOI: https://doi.org/10.1016/B978-0-443-14039-6.00016-6 

Interfacial modification of LiF-incorporated MnO2 mixed P3HT: PC60BM-based organic photoactive layer. Hong, K.J., Tan, S.T., Lau, K.S., Yap, C.C., Tan, C.H., Low, Y.J., Liew, J.Y.C., Chia, C.H. and Chong, K.K., 2023. Optical Materials, 144, p.114340. DOI: https://doi.org/10.1016/j.optmat.2023.114340

Structural modification and conductivity enhancement of NiCl2 incorporated P3HT: PC60BM based organic photoactive layer. Hong, K.J., Wira, N.F.H., Rizal, N.E.M.B.H., Issa, N.A., Lau, K.S., Yap, C.C., Tan, S.T., Liew, J.Y.C., Chia, C.H. and Chong, K.K., 2023. Optical Materials, 142, p.114090. DOI: https://doi.org/10.1016/j.optmat.2023.114090

Comprehensive Modelling for Analyzing the Power Conversion Efficiency of Polycrystalline Silicon Photovoltaic Device under Indoor Operating Conditions. Liew, S.Q. and Chong, K.K., 2023, February. In IOP Conference Series: Materials Science and Engineering (Vol. 1278, No. 1, p. 012001). IOP Publishing. DOI: https://doi.org/10.1088/1757-899X/1278/1/012001

Up-conversion Nanoparticle Perovskite Photovoltaic Device under Indoor LED and Outdoor Local Spectral Irradiances. Chong, K.K., Liew, S.Q. and Kurniawan, T.A., 2023, October. In 2023 IEEE Conference on Energy Conversion (CENCON) (pp. 26-30). IEEE. DOI: https://doi.org/10.1109/CENCON58932.2023.10369025 

Commercial Photovoltaic Performance Optimization Using Genetic Algorithms. Seera, M., Tan, C.J., Randhawa, K.K. and Chong, K.K., 2022. In Artificial Intelligence and Environmental Sustainability: Challenges and Solutions in the Era of Industry 4.0 (pp. 117-130). Singapore: Springer Nature Singapore. DOI: https://doi.org/10.1007/978-981-19-1434-8_6

Design and construction of active daylighting system using two-stage non-imaging solar concentrator. Chong, K.K., Onubogu, N.O., Yew, T.K., Wong, C.W. and Tan, W.C., 2017. Applied Energy, 207, pp.45-60. DOI: https://doi.org/10.1016/j.apenergy.2017.05.188

Dense-array concentrator photovoltaic prototype using non-imaging dish concentrator and an array of cross compound parabolic concentrators. Chong, K.K., Yew, T.K., Wong, C.W., Tan, M.H., Tan, W.C. and Lim, B.H., 2017. Applied Energy, 204, pp.898-911. DOI: https://doi.org/10.1016/j.apenergy.2017.03.108

Rectifying structural deflection effect of large solar concentrator via correction of sun-tracking angle in the concentrator photovoltaic system. Tan, M.H. and Chong, K.K., 2017. Solar Energy, 148, pp.140-148. DOI: https://doi.org/10.1016/j.solener.2017.03.062

Prototype of dense-array concentrator photovoltaic system using non-imaging dish concentrators and cross compound parabolic concentrator. Chong, K.K., Yew, T.K., Wong, C.W., Tan, M.H., Tan, W.C., Lim, B.H. and Lai, A.C., 2017. Energy Procedia, 105, pp.131-136. DOI: https://doi.org/10.1016/j.egypro.2017.03.291 

Comprehensive method for analyzing the power conversion efficiency of organic solar cells under different spectral irradiances considering both photonic and electrical characteristics. Chong, K.K., Khlyabich, P.P., Hong, K.J., Reyes-Martinez, M., Rand, B.P. and Loo, Y.L., 2016. Applied Energy, 180, pp.516-523. DOI: https://doi.org/10.1016/j.apenergy.2016.08.002 

Simplification of heat transfer modelling for 3-D open cell copper foam by using single-direction aligned cylinder-bank geometry. Tan, W.C. and Chong, K.K., 2016. Applied Thermal Engineering, 107, pp.1192-1200. DOI: https://doi.org/10.1016/j.applthermaleng.2016.07.035 

Solar flux distribution study of non-imaging dish concentrator using linear array of triple-junction solar cells scanning technique. Wong, C.W. and Chong, K.K., 2016. Solar Energy, 125, pp.86-98. DOI: https://doi.org/10.1016/j.solener.2015.11.029 

Study of automotive radiator cooling system for dense-array concentration photovoltaic system. Chong, K.K. and Tan, W.C., 2012. Solar Energy, 86(9), pp.2632-2643. DOI: https://doi.org/10.1016/j.solener.2012.05.033 

Comparison Study of Two Different Sun‐Tracking Methods in Optical Efficiency of Heliostat Field. Chong, K.K. and Tan, M.H., 2012. International Journal of Photoenergy, 2012(1), p.908364. DOI: https://doi.org/10.1155/2012/908364

Optical characterization of solar furnace system using fixed geometry nonimaging focusing heliostat and secondary parabolic concentrator. Chong, K.K., Lim, C.Y., Keh, W.L., Fan, J.H. and Rahman, F.A., 2011, September. In Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VIII (Vol. 8124, pp. 194-202). SPIE. DOI: https://doi.org/10.1117/12.891853 

Range of motion study for two different sun-tracking methods in the application of heliostat field. Chong, K.K. and Tan, M.H., 2011. R Solar Energy, 85(9), pp.1837-1850. DOI: https://doi.org/10.1016/j.solener.2011.04.024 

Study of image quality of mirror via solar flux distribution measurement using a high speed optical scanner. Chong, K.K., Yew, T.K., Wong, C.W. and Lau, S.L., 2011. Applied Optics, 50(25), pp.4927-4935. DOI: https://doi.org/10.1364/AO.50.004927 

Cost-effective solar furnace system using fixed geometry Non-Imaging Focusing Heliostat and secondary parabolic concentrator. Chong, K.K., Lim, C.Y. and Hiew, C.W., 2011. Renewable Energy, 36(5), pp.1595-1602. DOI: https://doi.org/10.1016/j.renene.2010.11.010 

Novel optical scanner using photodiodes array for two-dimensional measurement of light flux distribution. Chong, K.K. and Yew, T.K., 2011. IEEE Transactions on Instrumentation and Measurement, 60(8), pp.2918-2925. DOI: https://doi.org/10.1109/TIM.2011.2118850 

Application of on-axis general sun-tracking formula in open-loop sun-tracking system for achieving tracking accuracy of below 1 mrad. Chong, K.K. and Wong, C.W., 2011. International Journal of Energy Engineering, 1(1), pp.25-32. DOI: https://doi.org/10.5923/j.ijee.20110101.05 

General formula for on-Axis sun-tracking system. Chong, K.K. and Wong, C.W., 2010. Solar Collectors and Panels, Theory and Applications, 444. DOI: https://doi.org/10.5772/10341 

Optical analysis for simplified astigmatic correction of non-imaging focusing heliostat. Chong, K.K., 2010. Solar Energy, 84(8), pp.1356-1365. DOI: https://doi.org/10.1016/j.solener.2010.04.013 

Solar flux distribution analysis of Non-Imaging Planar Concentrator for the application in concentrator photovoltaic system. Chong, K.K., Wong, C.W., Siaw, F.L. and Yew, T.K., 2010, June. In 2010 35th IEEE Photovoltaic Specialists Conference (pp. 003013-003018). IEEE. DOI: https://doi.org/10.1109/PVSC.2010.5614112 

Open-loop azimuth-elevation sun-tracking system using on-axis general sun-tracking formula for achieving tracking accuracy of below 1 mrad. Chong, K.K. and Wong, C.W., 2010, June. In 2010 35th IEEE Photovoltaic Specialists Conference (pp. 003019-003024). IEEE. DOI: https://doi.org/10.1109/PVSC.2010.5614088 

Optimization of nonimaging focusing heliostat in dynamic correction of astigmatism for a wide range of incident angles. Chong, K.K., 2010. Optics letters, 35(10), pp.1614-1616. DOI: https://doi.org/10.1364/OL.35.001614

Optical characterization of nonimaging planar concentrator for the application in concentrator photovoltaic system. Chong, K.K., Wong, C.W., Siaw, F.L. and Yew, T.K., 2010. DOI: https://doi.org/10.1115/1.4000355 

Design and construction of non-imaging planar concentrator for concentrator photovoltaic system. Chong, K.K., Siaw, F.L., Wong, C.W. and Wong, G.S., 2009. Renewable Energy, 34(5), pp.1364-1370. DOI: https://doi.org/10.1016/j.renene.2008.09.001

General formula for on-axis sun-tracking system and its application in improving tracking accuracy of solar collector. Chong, K.K. and Wong, C.W., 2009. Solar Energy, 83(3), pp.298-305. DOI: https://doi.org/10.1016/j.solener.2008.08.003

Integration of an on-axis general sun-tracking formula in the algorithm of an open-loop sun-tracking system. Chong, K.K., Wong, C.W., Siaw, F.L., Yew, T.K., Ng, S.S., Liang, M.S., Lim, Y.S. and Lau, S.L., 2009. Sensors, 9(10), pp.7849-7865. DOI: https://doi.org/10.3390/s91007849